overscroll: Enable overscroll navigation by default.

content/browser/web_contents/web_contents_view_aura_browsertest.cc

Index: content/browser/web_contents/web_contents_view_aura_browsertest.cc
diff --git a/content/browser/web_contents/web_contents_view_aura_browsertest.cc b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
index aec22c9fc77d8c7386c2f5c1bad371be645a2e0d..81c8dfa25170f3cc98122412493f9b526479ba3f 100644
--- a/content/browser/web_contents/web_contents_view_aura_browsertest.cc
+++ b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
@@ -66,10 +66,6 @@ class WebContentsViewAuraTest : public ContentBrowserTest {
  public:
   WebContentsViewAuraTest() {}
 
-  virtual void SetUpCommandLine(CommandLine* command_line) {
-    command_line->AppendSwitch(switches::kEnableOverscrollHistoryNavigation);
-  }
-
   // Executes the javascript synchronously and makes sure the returned value is
   // freed properly.
   void ExecuteSyncJSFunction(RenderViewHost* rvh, const std::string& jscript) {